Application of nasopharyngeal airway combined with mask ventilation in the induction period of general anesthesia

Abstract

Objective To investigate the safety and efficacy of nasopharyngeal airway combined with mask ventilation in the induction period of general anesthesia. Methods 40 patients with potential difficult mask ventilation (upper airway obstruction) who needed general anesthesia with endotracheal intubation were randomly divided into nasopharyngeal airway group and control group (20 per group). The vital signs (systolic blood pressure (SBP), diastolic blood pressure, heart rate) and ventilation related indexes (pulse oxygen saturation, end tidal carbon dioxide, peak airway pressure) of two groups were observed and recorded at the time of entry (T1), before anesthesia induction (T2), 1 min after anesthesia induction (T3), 2 min after anesthesia induction (T4), 3 min after anesthesia induction (T5) and 1 min after endotracheal intubation (T6). Results The end tidal carbon dioxide at T4 in nasopharynx airway group was higher than that in control group (t=2.315, P 0.05). Conclusions The application of nasopharyngeal airway combined with mask ventilation during general anesthesia induction is safe and effective. Key words: Nasopharyngeal airway; Difficulty in ventilation; Mask ventilation; Anesthesia, general